1. School physical education teacher: communicate with school physical education teachers, generally have experience in group gymnastics arrangement, and are willing to guide students.

2. Fitness clubs or dance schools: These places have professional coaches and teachers who arrange group calisthenics. You can ask them if there are any classes arranged by group calisthenics.

3. Professional group gymnastics team coach: Some group gymnastics teams may have professional coaches who are good at the arrangement and training of group gymnastics. You can try to contact them and ask them if you are interested in teaching in your school.

4. Network resources: You can search for group gymnastics teachers online, and some teachers will promote their teaching services on their own websites or social media.

No matter which way you choose, remember to interview the teachers and ask them about their experience, teaching methods and expenses to ensure that you find the right teacher.